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    • 9. 发明授权
    • Perpendicular magnetic recording media and methods for producing the same
    • 垂直磁记录介质及其制造方法
    • US09472227B2
    • 2016-10-18
    • US13166002
    • 2011-06-22
    • Hi ShinIwao Okamoto
    • Hi ShinIwao Okamoto
    • G11B5/73G11B5/738
    • G11B5/7325G11B5/738
    • [Problem] An object is to provide a perpendicular magnetic recording medium that can realize both improvement in crystal orientation and refinement of crystal grain size and can achieve a higher recording density and a higher SN ratio, and a method of manufacturing the same.[Solution] A perpendicular magnetic recording medium 100 of the present invention is a perpendicular magnetic recording medium 100 having a base plate 100, and a laminate film including a first ground layer 150a provided on the base plate 100, a second ground layer 150b provided on the first ground layer 150a, and a main recording layer 160 provided on the second ground layer 150b and containing a magnetic material having a granular structure, wherein the magnetic material which constitutes the main recording layer 160 contains a CoCrPt alloy, and a material which constitutes the second ground layer 150b contains an Ru—Co oxide alloy.
    • [解决方案]本发明的垂直磁记录介质100是具有基板100的垂直磁记录介质100,以及包括设置在基板100上的第一接地层150a的层压膜,设置在基板100上的第二接地层150b 第一接地层150a和设置在第二接地层150b上并包含具有粒状结构的磁性材料的主记录层160,其中构成主记录层160的磁性材料包含CoCrPt合金,以及构成 第二接地层150b含有Ru-Co氧化物合金。